Osteogaster oharai

Osteogaster oharai Tencatt, Carvalho, Silva & Britto, 2025

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drawing shows typical species in Callichthyidae.

Classification / Noms Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Callichthyidae (Callichthyid armored catfishes) > Corydoradinae
Etymology: oharai: Named after Dr. Willian Massaharu Ohara, a distinctive ichthyologist, for his extensive contributions to knowledge of South American freshwater fishes, and his fundamental role in the professional history of LFCT, having generously donated dozens of species of Corydoradinae collected by him over the last decade; noun in a genitive case.

Environnement : milieu / zone climatique / profondeur / gamme de distribution Écologie

; eau douce démersal. Tropical

Distribution Territoires | Zones FAO | Écosystèmes | Occurrences | Carte par point | Introductions | Faunafri

South America: Brazil.

Taille / Poids / Âge

Maturité: Lm ?  range ? - ? cm
Max length : 4.3 cm SL mâle / non sexé; (Ref. 138114)

Description synthétique Clés d'identification | Morphologie | Morphométrie

This species is distinguished by the following characters: with an oblique dorsolateral longitudinal dark stripe on flanks, starting at first dorsolateral body plate and gradually descending towards middle portion of caudal-fin base, variably extending diffuse on ventral lobe of caudal fin; with a moderately-developed posterolateral portion of scapulocoracoid, not expanded mesially; dorsolateral stripe not extending anteriorly and meeting its counterpart on head (Ref. 138114).
Body shape (shape guide): elongated; Cross section: oval.

Biologie     Glossaire (ex. epibenthic)

Captured in small streams, tributaries of the rio Aripuanã upstream the Dardanelos-Andorinhas waterfalls complex, where the average width was estimated in 2.18 m ± 0.80, depth in 17.0 cm ± 7.6, water current in 3.83 m/s ± 7.4, dissolved oxygen in 1.18 mg/l ± 0.99, and temperature in 25.1 °C ± 2.0. In the rio Juruena basin, most specimens were collected in small and shallow isolated pools of intermittent streams, directly flowing into the rio Juruena, also occurring in larger/deeper streams, as the igarapé do Boi Preto. In these sites (rio Juruena basin), the streams have dense marginal vegetation, muddy or dark tea-colored water, and substrate composed by sand and/or clay, leaf litter, submerged logs and branches, and large rocks. In the rio Juruena basin, no additional Corydoradinae species was found in syntopy (Ref. 138114).

Cycle de vie et comportement reproducteur Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Téléchargez vos références | Références | Coordinateur : Reis, Roberto E. | Collaborateurs

Tencatt, L.F.C., V. Carvalho, H.P. Silva and M.R. Britto, 2025. A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster. Neotrop. Ichthyol. 23(2):e240134. (Ref. 138114)

Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

FAO - Publication: search | FishSource |

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Écologie trophique
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Sources Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimations basées sur des modèles

Indice de diversité phylogénétique (Réf. 82804):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00741 (0.00287 - 0.01912), b=3.14 (2.92 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Réf. 69278):  3.0   ±0.3 se; based on size and trophs of closest relatives
Résilience (Réf. 120179):  Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité de la pêche (Ref. 59153):  Low vulnerability (10 of 100). 🛈